/* 页面整体 */
body {
    font-family: 'Arial', sans-serif;
    background-color: #f0f2f5;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

/* 注册容器 */
.register-container {
    width: 360px;
    padding: 30px;
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

/* 标题 */
.register-container h1 {
    font-size: 24px;
    color: #333333;
    margin-bottom: 20px;
    font-weight: bold;
}

/* 输入框 */
.register-container form input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #cccccc;
    border-radius: 6px;
    font-size: 14px;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

.register-container form input:focus {
    border-color: #4CAF50;
    outline: none;
}

/* 提交按钮 */
.register-container form button {
    width: 100%;
    padding: 12px;
    background-color: #48b54c;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.register-container form button:hover {
    background-color: #45a049;
}

/* 返回按钮 */
#back-button {
    margin-top: 15px;
    padding: 10px;
    background-color: #f44336;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

#back-button:hover {
    background-color: #d32f2f;
}

/* 响应式设计 */
@media (max-width: 480px) {
    .register-container {
        width: 90%;
        padding: 20px;
    }

    .register-container h1 {
        font-size: 20px;
    }

    .register-container form input,
    .register-container form button {
        font-size: 14px;
    }
}